Machine for grinding toric lenses.



"1%. 881,168. PTENTED MAR. l0. 1908-.

C. vF. WALL & C. SAILE. MACHINE POR GRINDlNG TOEIC LENSES. APPLICATION FILED MAB. 1, 1906. EBNBWBD. JUNE 19. 19o?.

3 SHEETS-SHEET 1 y Q l@ "M Illllllllllllllllllll PATENTE) MAR. 10, `19,08. G.- E. WALL an c. sAILm MAGHINE PoR GRINDING 'rome LENsBs. APPLICATION FILED MAR. 1. 1906. RENEWED JUNE 19,1901'` 3 SHEETS-'SHEET 2.

Awww@ i v v. PATENTED MAR-10,' SfAILE.

C. P. WALL n C. 'MACHINE FUR GRINDING TORIU LENSES.

APPLIUATION FILEDMAB. 1. 190s. BBNEWED JUNE 1e. 1907.

's Simms-:Samir: a.

IINHIIHI` III Naw www@ if UNITED sTATEs CHARLES F. WALL AND CHARLES SAILE, QF

PHILADLPHIA, PENNSYLVANIA; SAID SAILE ASSIGNOR TO SAID WALL.

MACHINE FOR GRINDING TOEIC LENSES.

Specification of Letters Patent. 'Patehtedlarch 10; 1908;

Application mea March 1, 190e, serial Nu. alianza. nenweaiune 19, '1907. seifii mi. 879,796.

Improvements in Machines for Grinding Toric Lenses; and we do hereby declare the' following to be a full, clear, and exact de'-- scription of the invention, such as will Aenable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements inf machines for grinding toric lenses.

i n tione it is a solutely essential that the lens and the grinding tool shall beso held during the -grinding operation that corresponding axes of the lens and tool shall always be vmaintained in parallel relation. Iniother Words, .it is requisite in producing a torio lens that diametrical lines cut inthe lens and grinding -tool` shall' always remain in .parallelism throughout the grinding operation,I and it is ytherefore the object of the present invention to provide a machine capable of fulfilling the conditions specified; one which is of extreme simplicity, and one which may-be produced at minimum expense, operate with economy, accuracy and ease, and which Wlll produce a toric lens in an expeditious manner.

With these general objects in view, and

' others which will appear as the nature of the improvements is better understood, the invention consists substantlally in the novel construction, combination and arrangement/ `of parts, as will be hereinafter fully described,

illustrated in the accompanyingv drawings, a'nlvpjointed out in the appended claims.- .l fr0,

ile the invention is illustrated by only the preferred embodiment thereof, it will, of course, be understood that the same vis capaf yble of adaptation in other forms, andv such forms, though not expressedherein, are considered to fall'within vthe range and scope of the invention.

I In the drawin s-Figu're 1 isa. side eleva" ,tion'of a -toric ens grinding machine 'con-f struetedin accordance with, and embodying' thepri'nciple of., the herein-described invention, Fig- 2 is alongitudinal sectional viertr I thereof.' Eig. Bvisa top plan view. 4 isf uckl. folg; the

grindin lenses of the character menthereof. y

--Referring in detail-'to 'the drawings,fthe numeral 1 designates the table or .bed of the herein-described machine, which table-or bed is mounted upon suitable standards or suports 2, and said table and supportsfare ormed of any material suited to the fp ose. Arranged at one end ofthe table or bed 1 is a master gearl 3, the 4lat-ter being mounted upon a shaft 4 journaled in alined bearings 5 formed in a airo vupw'ardlyexten ding standards 6, an( the outer end of said shaft 4 is prolon ed'beyond thefend of the table 1 to ermit t e application' thereto' of fast and bolte =or otherwise suitably fastened tothe table or'bed .to Vbe firmly held thereon, and

ings. The numeral 9 desi ates a lower countershaft, the rear end o said shaft being journaled in a bearin` 10 depending'from'the of said shaft is likewise journaled in a bearing 11 carried by a dependi'n bracket 12 also ared upon thecounters'haft, at a' point-adjacent to the depending bearii'l 10, is auxthe teeth of the master gear 3, which latter project through thetable or bed 1, and thus motion is transmittedrm the shaft'4 1to the countershaft v9.v The"latter is also provided at its forward end witha' niiter ge'a1'14, and .said gear 14.1neshes' 'with a similar Agear 15 which' s indle passes upward y through the table or. ed 1. The spindle 16 isreceive'd by 4and works within a pairof vertical bearings- 17, said bearings being alined and carried by the bracket 12at kpoints above andjoelow the -horizontal bearing 11 in said bracket. It will thusl be seen 'that-the spindle 16 i's-always held at Vright angles" to the countershat 9,

by insured. vIt will alsobe noted that the up er bearing 17, and yertical movement of the spindle-16 thereby prevented. The u per bearing`17 '-alsoproj ectsthrough the immediately-above-saidj-bearing, an' in. close tool. Fig, 6 is a transversesectlonal view underside of the tale l1*, and the forward'end ranged at the underside o the l'ed'l. 'Mount-- iliary gear 13 the teethfbf' 'ch mesh with.

carried by averticallyi'arran eti-'spindle 16,

pinion 15 is `arranged''ii'nm'e'diately below the' oose ulleys 7 and 8. The standards 6 arey i-thus preserve the alinernent of the shaft bear- '-51 10o and accurate running'oi said spindle'is -ther'el" 105.. tab e or bed 1,-and arrangedupon'fthe s indle 16 pfbvclts the'abrasive usedin t egrind? 116 .ing of the lens passing down the spindle 16 and accumulating in the bearings and gears beneath.

4The numeral 19 designates the chuck for 5 the grinding' tool, the upper end of said chuck being provided With. a secket or recess for receiving the grinding tool 21, and said tool has a compound curvature, orcurves of different radii, as is characteristic of tools of this The tool 21- is held Within the character. chuck. 19 through the medium of two binding screws 22, and thus it is evident that said tool may bereadily removed whenever de sred, or revolved'in the chuck to obtain the desired change in axis of the'resulting lens. At the u per end of the chuck 19 is mounted 'an annu ar plate 23, which plate is of greater diameter than the grinding tool. and said late 23 is irmlysecured to the chuck 19.

he plate 23 is provided upon its upper face transmittedto the countershat 25 from the shaft 4.V To render the shaft 25 flexible in order that the lens bein 4pro erly operated relative y to the grinding too a universal `joint 28 is interposed between the ends of ,said countershaft, and consequently the forward end of' said shaft is 'movable while the rear end, -orl that uponV which the gear 27 is arranged, is fixed. It will thus be seen that the gear 27 maintains a fixed relation 4to the gear 3, and conse uentlyA B Gman ordinary construction of gear may d f en o ployed. Sleeved upon the forwar f 4the shaft 25 is a skeleton head 29, the extremity of the countershaft 25 projecting' slightly Within said head, and mounted upon said whic ried b a vertical spindle 32 journaled in vertical earin s 33. which are formed in the lprojecting extremity is a miter gear 30,

head 29 an arranged in vertical alinement.

'The gear 31 is arranged uponthe spindle 5 5, l32 Within the head 29 and at a point just be- 'low the upper bearing 33, and consequently vertical displacement of the spindle 32 is prevented. Y

Arraneed at thelower end of the spindle 16.0 32 is a head 34 depending from which are `diainetricaIly-opposite pairs of guide pins 35, andsaid pairs of guide pins 35 form 4Ways for the reception of out\\ardlyextending guide lugs 36 arranged upon the lens carrier 37.

-The latter is substantially cup-shaped, and

auxiliary'gear27 Whichmeshes With the mas-v f v ter gear 3, and by means of Which motion is' ground may be gear meshes with a similar gear 31 carseines its center is provided with a depression or recess 38 for the reception of a centering point 89ocarried bythe head 34. By means of the construction described it Will be seen that the lens carrier37 has a substantially point 39, being uid-ed in such movement by the lugs 36'Wor ing in-the Ways formed by the guide pins 35, and hence it is evident that the lens arranged upon the carrier will grinding tool, 21 in the 'operation of the machine, I

socket 40 which receives a handle 41, and by shifted across the table or bed -1 in order to shift the lens acrossthe face oi' 'the grinding tOl 2l. v

To properly support the head 29 a rear- 'wardly-extendin yoke 42 is carried by said head, said yoke aving a hinge connection, through the medium of bolts' 43, or their equivalent, with a vertically-arranged yoke 44, and the latter is provided with a'down- Wardly-extending 'stud 45 received by a socket 46 formed in the upper end of a standard 47 bolted or otherwise suitably secured to the table or bed 1. Through the medium of the stud 45 it Willbe seen that the yoke 44 has a swiveling 'engagement with the standard 47, and thusthe yoke 44 will follow the movements of the head 29 as the latter is the lens across the face of the grinding tool.

In the operation of the herein-described machine, poweris applied to the master gear 3 through the medium of the fast pulley 7, and a lens having been placed'upon the carmanner, the head 29 is shifted to osition the lens at the desired point upon tie grinding tool 21. As the machine operates, the lens and tool 21 Will rotate at the same speed, the diametersof the various intermeshing gears 'and inions being the same, respectively, `but `t e laxes of rot-ation of the lens and tool will be in different verticalplanes in order to effect the grinding of the ,torio surface upon the lens. This osition may be shifted from time to time through the medium of the handle 41 and the head 29, which shifting is permitted by reason of the universal joint 28 and the yoke connections 42 and 44. A toric lens may thus be produced in an expeditious manner and with great ease and accuracy. In positioning the grinding tool .the screws 22 will first be loosened, thus enablin the tool 21 tobe rotated in the chuck 19, W ereby the tool 2-1 may be brought orpposite the desired graduation to give t e proper axis to the4 lens, whereupon the screws 22 are again tightened, .and the tool 21 firmly held in the position to which it is adj uste universal movement upon the centering' readily conform to the curvature of theV means of 4the 'latter the head 29 may -be` moved across the table or bed 1 in moving rier 37 andcemented thereto in the usual v The skeleton head 29 is' provided with a i The arrangement of the lower counter- .shaft 9 and the parts for o erating the grinding tool 21 being below t e table or bed of the machine, said parts will be protected from theemery or other abrasive used upon the grinder, and, as hereinbefore indicated, the guard 18 will eiectually exclude the passage of the abrasive downwardly uponv I Vaii ahi/line for grinding lenses, a grindv tooialeii'sparrier, the axis of rotation of 'one of said elet'nentsfbeing fixed, and the axis ofjthe'otlier movable in relation the/reto to peiQnnt one of said elementsmov-ing across theijaceI of the other, and means for operatingthe grinding tool #and the lens carrier Without disturbing the parallel relation of' corresponding diainetrical axes of the tool 'and carrier.

2. In a machine for grinding lenses/ a grinding tool hawng a iixed axis of r tation, a lens carrier the axis of rotation of W iicliis movable relatively to the axis of rotation of the rindin'gtool, means for operating .the grin ing .tool and-the lens carrier Without disturbing-the arallel relation of corresponding diametrica axes of the tool and carrier, andmeans for shifting the position of t-he lens carrier upon the grinding tool.

3. In a machine for grinding lenses, a

grinding tool having a fixed axis of rotation,

a lens carrier the axis of rotation of which is movable relatively to the axis of rotation of the grinding tool, and means for rotating the grind'in tool and the lens carrier Withoutdisturbing the -arallel relation of corresponding diainetrica axes of the tool and carrier.

4. In a machine -for grinding lenses, a grinding tool having a fixed axis of. rotation, a lens carrier theaxis of rotat-ion of Which is movable relatively to the axis ofrotation of the grinding, t-ool, means for rot-ating the grinding tool and the lens carrier .Without disturbing the parallel relation of corresponding diametrica axes of the tool and carrier,

and means for shifting the position of the lens carrier upon the' grindingv tool.

"5"fIn'"'a-"mach1nefor. grinding lenses, a grinding toc-l, a lens carrier, means for/ rotating the grinding tool and the lens carrier, ngithout. disturbing the parallel 'relation' of corresponding diametriealaxes of the tool and carrierandie'ans for varying the position of the lensvcarrier relative to thegrindingtool for changing the relative positions of the axes of rotation of the carrier and tool. ..95 y

6. In' a machine for grinding lenses, a

table or bed, a spindle journaled carrier being movable relatively to the axis of rotation of the grinding tool and means for actuating the griridin'v tool and lens carrier Without disturbing the parallel relation of corresponding dianietrical axes of the tool and carrier.

7. In a machine for grinding lenses, a grindingtool having a fixed axis of rotation, a movable head, a lens carrier carried by said head, the axis of rotation of said lens carrier being movable relatively to the axis of rotation of the grinding tool, means for actuating tlie grinding tool and lens carrier Without disturbing the parallel relation of corresponding diainetrical axes of the tool and carrier, and means associated With said head for manually varying the positions of the axes of rotation of the tool and carrier.

8. 4In va machine for grinding lenses, a table or bed, a rotatable spindle journaled thereon and having fixed relation thereto, a grinding tool carried by said spindle, a movable support arranged above said grinding tool, a 1

spindle carried by said support, a lens carrier associated with said spindle and movable by said support across the face of the grind.- ing tool, and means for actuating the grinding tool and the. lens carrier Without disturb- ,ing the parallel relation of corresponding diametrical axes of the tool and carrier.

9. In a machine for grinding lenses, a'table or bed, a grinding tool journaled thereon, and having a fixed axis of rotation, a movable head .arranged above said table or bed, a lens carrier operatively related to said head and movable by the latter across t-he face of the grinding tool to varythe position of the axis of rotation of the lens carrier relatively to the axis of rotation of the grinding tool, and means for actuating the grinding tool and the lens carrier Without disturbing the parallel relation of corresponding diametrical axes of the tool and carrier.

10. In a machine for grinding lenses, a table or bed, a grinding tool journaled thereon and` having a iixed' axis of rotation, a.

movable head arranged above said table or bed, a lens carrier operatively related to said head and having a substantially universal movement thereon,A said lens carrier being movable by said head across t-he fac-e of the grinding tool to vary the position of the axis of rotation of the lens carrier relatively to the axis Vof rotation of the rinding tool 4and means for actuating the grinding tool and the lens carrier Without disturbing the parallel relation of correspondingd'anietrical axes of the tool and carrier. i

11. 4'In a machine for grindinfy lenses, a thereon and having fixed relation thereto, a rinding tool carried vby said spindle, a' niova le head arbeing ingvable relatively to the axis of rota.-.

rangedabove said table o'r bed, a spindle carried by said head, a lens carrier associated with said spindle, a connection intermediate the lens carrier and the spindle to permit the carrier having a substantially` universal movement thereon, said lens carrier being movable by the head across the face of the grinding tool to vary the position of the axis otrotation of the lens carrier relatively to the axis of rotation of the grinding tool, and means for actuating the grinding tool and the lens carrier Without disturbing the parallel relation of corresponding diame trical axes of the tool and the carrier.-

12. In a machine for grinding lenses,I a table or bed, a grinding tool journaled thereon and having a iixed axis of rotation, a lens carrier operatively related to the grinding tool, the axis of rotationof the lens carrier being movable relatively to lthe axis of rota-1 tion of the grinding tool, a'niaster gear, and countershafts interposed between the master gear and the lens carrier and grinding tool respectively, whereby the lens carrier and grinding tool are actuated by said master ear. g 13. In amachin'e for grinding-lenses, a table or bed, a grinding tool journaled thereon and having a fixed axis of rotation, a lens carrier operatively related to the ,grindingV tool, the axis of rotation ofthe -lens carrier tion o e grinding tool, a master gear, countershafts interposed betw een the master gear and the` lens carrier and grinding tool respectively, Whereby thel lens carrier and grinding `tool are actuated by said master gear,.and

means for shifting the position of the lens carrier relative to the grinding tool. V

14. In a 'machine Vfor grinding lenses, a

table or bed, a grinding tool journaled thereon, amaster gear, a iixed eountershaft interposed between the master gear and the grinding 'tool for actuating the latter, a lens' carrier operatively-related to the grinding tool and shiftable thereover, and a tlexible counters'haft interposed between the max-sterA gear and the lens carrier, whereby the latter,

-.may be actuated from the master gearwinaccordance 'with the varying positions of the lens carrier. p

15. ln' a machine for grinding lenses, a table o r bed, a grinding tool journaled thereon, a master gear, a fixed countershat.- interposed between the master Cfearaii'df the grinding tool for 'actuatino' therlatter, a lens carrier operatively related` to the grinding tool and shiftable thereover, a movable hear with which the lens carrier is associated, and a countershaft connected to said head and. interposed between 'the master gear and the lens carrier, said countershaft permitting' niovementof said headto' vary'the position of the lens carrler relatlvely to thegrdnding tool, and to permit the lens carrier being actuated in the positions to which it is shifted. 16. lin a machine for grinding lenses, a tableor bed, a spindle journaledfthereon, a grinding tool carried by said spin/(Hefe inaster gear journaled upon said-table or bed, a countershaft interposed .betweenI said master gear and the spindle carryin'gthe grinding tool, wht@v by theJF 1laffiter is actuated by the master gea ens carrier arranged. above the grinding tool and shift-able across the same, and means for actuating said lens carrier.

17. [n a machine for grinding lenses, a table 0r bed, a spindle journaled thereon, a grinding tool carried by said spindle, amaster gear journaled upon said tableor bed,a countershaft interposed between the master gear and said spindle for actuating the grindingtool from the master gear, ra lens carrier arranged above the grinding tool and shiftable across the same, and a countershaft in-4 terposed between the master fear and said lens carrierV for actuating the zlatter by they master gear.

18. In a machine for grinding lenses, a table or bed, a grinding tool journaled thereon', means for actuating said grinding tool, a movable head mounted upon said table or bed, aspindle journaled in said head, a lens carrier associated with said spindle, and means for actuating the lens carrier without disturbing the parallel relation oi corresponding axes of the grinding tool and lens carrier.

19. In' a machine for grinding lenses, a

.table or bed, a grinding'tool journaled theres 10o on, means for actuating said grinding tool, 'av movable head'mounted uponfsaid table or bed, a spindle carried by saidhead, a lens carrier associated with said spindle, and a 'countershaftconnected toV said head" and 105 countershait.interposed between said master gear and the spindle carrying the grinding tool for actuating the latter bythe master gear, a movable head mounted upon said table or bed, a spindlejournaled therein, a lens carrier associated n ith said spindle, 'and a eountershait interposed between the master gear and the spindle for actuating the latter and the lens carrier by the master gear.

ln testimony Vwhereof we aflix our signatures, in the presence of two 1aitnesses.

ACHARLES F. WALL.

CHARl-JES SAILE.'

Witnesses: c v

J. HARRY Bownns, WiLLiAir L. WALL, 

